Final Answer:
The given statement "If CO2 production exceeds the body's ability to eliminate it by ventilation, the PaCO2 rises." is True Because carbon dioxide (CO2) is a natural byproduct of cellular metabolism, its elimination is crucial for maintaining the body's acid-base balance. Therefore, the correct option is A) True.
Step-by-step explanation:
When the body produces more carbon dioxide (CO2) than it can eliminate through breathing, the partial pressure of carbon dioxide in arterial blood (PaCO2) increases. This condition is known as hypercapnia. It typically occurs when there's inadequate ventilation or respiratory function is compromised. Normally, the body maintains a balance by exhaling CO2, but if this process is disrupted, such as in respiratory illnesses or impaired lung function, PaCO2 levels rise.
When PaCO2 rises, it can lead to respiratory acidosis, affecting the body's pH balance. Monitoring PaCO2 levels is critical in assessing respiratory function and the efficiency of ventilation. Therefore, if CO2 production exceeds the body's ability to eliminate it through ventilation, the PaCO2 levels indeed rise, making the statement true.
Various conditions, such as lung diseases, airway obstructions, or central nervous system disorders, can contribute to this imbalance and necessitate medical intervention to restore proper ventilation and gas exchange. Therefore, the correct option is A) True.